Add on your deps
[ZendFramework]
git=http://github.com/andres-montanez/Zend-Framework.git
version=v1.11.11
target=/zend-framework
And then
bin/vendors install
And last, register the prefix on autoload.php
$loader->registerPrefixes(array(
...
'Zend_' => __DIR__.'/../vendor/zend-framework',
));